To me it looks like aphid damage.
If it is not too severe, leaving your plant alone and waiting for the predators to show up and eat the aphids can be the easiest solution to your issue.
Maintaining a balanced ecosystem in your yard by not spraying chemicals and letting nature work things out is often the best option.
The aphids may appear to increase for a day or three, but soon enough the ladybirds, wasps and even small birds will find them and reduce their numbers to a point where they are not causing any real damage to the plant.
Spraying with chemicals also kills the good bugs, creating an environment where the bad bugs build up, so then spraying again to get rid of the bad bugs, which also kills the good bugs then allows the bad bugs to attack again, so spraying again............... it ends up a never ending merry-go-round of spraying. Leaving nature to sort things out by not spraying enhances/encourages a balanced ecosystem that looks after itself.
Besides, do you really want to spray chemicals on a plant you intend to smoke?
A few spotty leaves is an acceptable trade off for having clean buds in my opinion!
Hope this helps, Organoman.